Damper



Nov. s, 1927.

o. KELM DAMPER Filed Nov. 9, i926 3 Sheets-Sheet 1 Nullll lill- O; KELM DAMPER Nov. 8, 1927.

Filed Nov. 9, 1926 3 Sheets-Sheet 3 agi@ Jdem Patented Nov.` 8, 1927.

PATENT G-FFQFL, t

yor'ro Karin, or Manconi, Iowa naivrrnn;

Application led November 9, *1926. Serial IIo. 147,335.'V

The object ot this invention is to provide means tor automaticallycontrolling the tires inbrooder stoves and the lilre in windy weather. The invention seeks to provide a dan'iper so mountel upon theoutlet pipe of a stove or other heater that it will close inv the event that the wind exceeds a predetermined velocity, and thereby prevent excessive 'draft through the heater. The invention also seeks to provide such a device which'will, even when closed, permit suiicient draft through theheater to maintain combustion andprevent the temperature of the broeder falling below normal. The invention also provides means 'for limiting the opening movement ot the damper and means for maintaining the damper in proper relatioirto Vthe wind. The invention also in cludes'the provisionot a ventilator whereby an accumulation oi' foul air in the broeder or other ,con'ipartment may be avoided. The invention is illustrated in the accompanying` drawings and consists in certain novel teatures which will be hereinafter iirst fully described and then more particularly pointed out in theappcnded claims. i

1 In 'theA drawings: E y l Figure l is a sectional elevation ot a structure embodying the invention, the damper being in open position; y

1 2 is an' enlarged detail view similar to Fig. l and showing` the damper in closed position;

Fig. 3 is an 3 3 of Fig. l; l

Fig. 4 is an enlarged section on the. line 4-4 ot Fig. l;

Fig. 5 is a perspective view showing the damper niountinglwith the parts separated. but approximately in their relative positions; y

.F ig. 6 is a perspective view of the means for adjusting the ventilator;

Fig. 7 is a detail section showing the inanner of mounting the damper when the lventilator isv not used, andk p Fig. 8 is a detail showing the ventilator adapted for use without the damper.

Referring more particularly to the draw ings `by numerals, l designates a portion ot the roof ot a brooder which is illustrated as being of a substantially conical formation but may, ot course7 be of other designs, and 2 designates a stove pipe or outlet from a heater which passes through the root at enlarged section on the line the peak of the same and extends above the same as is now generallypracticed. In carrying out the present invention, I provide a tube lwhich is et proper diameter to tit about the `upper endportion of the stove pipcQ and is preferably maintained in concentric spaced relation thereto.` The lover end of this outer pipe 3 is expanded and flared, as shown at 4,'to provide ay circular fla-nge adapted to restupon the root ot the brooder at the peak ot the same and be se.- cured thereto whereby the pipe will be supported upon the root and the-.entrance of rain through the escape opening ot thereof will be prevented. In `order topmaintain the outer pipe or tube in proper relation to the stove pipe, an inner collar or` band ,5 is provided whichn'iay be held in its place within the outer sleeve by set screws (S-in an obvious manner. lWhen a ventilator is to be used in connection with thedamper, the flange 4 is notplaced directly upon the root as illustrated in Fig. 7, but kis bolted or riveted to a canopy 7 which extends outwardly beyond the flange and, eitect, con stitutes an extension ofthe same. To the inner or under side ot this vcanopy 7, supporting standards or posts S are rigidly secured and the lower ends' of these supports are firmly attached to a collar or band 9. A sleeve 10 is tted through the outlet opening in the root and `is of .such dia-meter that the band or collar 9 and the supporting bars 8 secured thereto will tit closely within the sleeve so that the trictional engagement ot theband `and the arms with the sleeve will support the ventilator in any position in which itmay be set. rlhe sleeve is provided above its lower end with an external annular iange lll which is adapted to be secured upon the roof andv constitutes a 'water shed to prevent theentrance ot moisture between the sleeve and the root. To the band or collar 9 at diametrically opposite points thereof, I pivotally lattach thel upper ends `oi links 12 which depend below the collar and -below the sleeve l0 and are pivoted at their lower ends to a setting frame 13 consisting of a pair of levers ulcruinedy at one end upon the roof structure and converging from their pivots past the stove pipe to be coni nected at their tree ends, and a handle meniber 14 is attached to and depends from the tree ends of said levers, Between the stove pipe and the pivotal'fsupports of the levers, a cross bar l5 is secured to and between the fill CII

saine and a retractile spring 16 is attached to the said cross bar and to the roof structure, as shown, the tension of this spring being such that the levers will be nicely balanced and the weight of the same will be carried by the spring and not transmitted to the ventilator. Dropping or closing of the vventilator under the weight of the lever or setting frame is thus avoided.

'lo the upper end portion of the outer pipe or sleeve 3, l secure the vertically spaced collars 17 and 18, the' upper collar 17 being provided with an outstanding an nular flange 19 at its upper edge, while the lower collar 1S is provided with a similar flange 2O at its lower edge. Disposed between these collars 17 and 18 and the flanges thereon so as to be freely rotatable is a hub member 21 of such dimensions that it will be supported by the collars, as shown and will be understood. rlhe hub is preferably cut away at one side, as shown at 22 in Fig. 5, whereby weight is reduced and the hub acquires the form of a half cylinder provided with arcuate extensions 23 at its ends, which extensions terminate in mating lugs 24 adapt-ed to receive between them the inner end of a` vane 25, securing bolts or rivets 26 being inserted through the said lugs and the vane to secure the vane in place and secure the hub around the collars 17 and 18. rlhe vane may be vof any desired outline and its object is to turn the hub member about the supporting collars so that the closed side of the hub will always bepresented to the wind. lf desired, any approved rollers or anti-friction devi-ces may be provided at the ends of the hub to ride upon the supporting collars and reduce the frictional wear between the contacting parts.

Carried by the upper end of the hub is a platform 27 which, as shown most clearly in 5, is of a substantially rectangular form and is provided in its front edge with a semicircular recess whereby it may fitabout the upper extremity of the huh, and on the under side of the platform, following` the said re cess, is an arcuate flange 28 bearing against the hub and secured thereto by rivets or bolts, as shown. Connected to the front corners of the platform are braces 29 which converge therefroniand are secured to the vane adjacent the upper edge thereof whereby to impart additional rigidity to the vane and aid in supporting' the same. end portion of the platform is reinforced by doubling the material of the platform upon itself, as indicated at 30; the free edge ofthe doubled portion being bent upwardly to provide a stop flange 31 for a purpose which will presently appear. lt may be noted at this point that all the parts of the apparatus may be constructed of sheet metal which will possess sufficient strength for the purand which may be easily shaped to The rearacquire the desired forms. The platform is further provided at its rear corners with upstanding ond lugs 32 having openings 33 therethrough, as clearly shown in Fig. 5. lnivotally supported between the lugs 32 is a damper hood or cowl 34 which is provided at its rear edge with a hinge sleeve 35 adapted to fit between the lugs 32 and receive a pintle 36 inserted through the openings 33 and the said sleeve 35 to pivotally attach the damper to the platform in an obvious manner. The damper is of proper dimensions to entirely cover the upper end of the stove pipe and the sleeve 3 when it is in the lowered position shown in Fig. 2 and project beyond the. same sufficiently to prevent the entrance of rain or other elements into the pipes. rlh'ansversely the damper is arched, as shown most clearly in Fig. 3 at 37, and its side edges converge toward its free end and are formed with depending flanges 38 which may rest upon the platform in the lowered position of the damper and thereby aid in supporting the same and also provide a stop to preventthe damper comingr into actual contact with the upper ends of the pipes. The principal purpose of the flanges 3S, however, is to resist buckling of the damper and to prevent the side entrance of wind under the damper to the pines. The rear portion of the damper is curved or dished, as indicated at 39, and this curved or dished portion is adapted to bear against the upper edge of the stop flange 31 in the closed position of the damper and thereby provide the desired limit to the closing movement. Fhe opening movement of the damper is limited by a bail et() which is secured to the platform near the front corners of the same and rises therefrom in such position that `it passes over the front free portion of the damper, the bridge of the bail being` disposed in the path of the damper so that it will arrest the opening mov ment of the same, as shown in Fig. 1. rlhe opening of the damper is accomplished by a retractile spring i1 attached at its upper end to a projection li2 on the damper and at its lower end to a hook i3 on the hub 21. lt will be understood that by engaging the spring at different points in its length with the hoolr the tension of the spring may be adjusted so that the damper will be held open against the force of wind to a desired degree. The damper in its open position will7 of course, he presented to the wind and the force of the wind applied upon the upper surface of the damper wil'l tend to close it. ln order, however, that the closing of the damper in an excessive wind may be assured, l provide a vane ifi which is carried by an arm Ll5 secured to and rising from the rear portion of the damper and which may be integral with or a prolongation of the projection 42. The arm ll5 is obviously disposed at an angle to the damper so that in the open position of the damper the vane lili will be disposed vertically and will receive the full force of the wind.

The operation will, it is thought, be un- 2 derstoed from the foregoing description,

' for which the springhas been set, the force of the wind acting` upon the vane la and the damper will, of course, overcome the spring and swingr the damper to the closed posit-ion shown in Fig. 2 so that excessive draft i through the stove pipe will not be created and, consequently, there will not be an excessive heating` of the brooder with its attendant wasteof fuel. In the closed position of the damper, however', there will still be an open space between the top of the stove pipe and the damper suflicientto maintain normal draft even under the excessive wind. Of course, when the wind dies down, the spring will Iautomatically return the ii'' damper to the open position. The device is exceedingly simple and will tend to maintain an even ten'iperature in the brooder without requiring constant attention from the owner or operator. The ventilator is preferably employed in connection with the damper but, as illustrated in Fig. 7, its use is not imperative. Suiiicient clearance is provided at the upper end of the stove pipe to permit adjustment of the ventilator without impairing the eilicient operation of the damper.

, in summer, when the fires are not maintained and the damper or .draft-controlling mechanism is not needed, the pipe 8 is removed and a conical cap 50 is secured upon the canopy 7, as shown in Fig. 8.

Having thus described the invention, claim:

l. in an apparatus for the purpose set forth, the combination of a heat outlet, a

platform mounted at the upper end of the outlet and rotatable about the same, a damper j )ivotally supported on the platform, means yieldably holding the damper in open position and presented to the wind, means on the platform for limitingV the opening movement of the damper, means on the damper whereby it. will close under abnormal winds, and means on the platform for limitingT the closing-` movement ofthe damper when the same is actuated by an abnormal wind.

2. In an apparatus for the purpose set forth, the combination of an outlet pipe, a

hub member rotatably `fitted upon the said pipe, and a damper pivotally mounted upon the upper end of the hub member and adapted to extend over theV end of the outlet pipe, the damper, being arched transversely whereby in closed position it. will be out of contact with the end of the outlet pipe.

3. In an apparatus for the purpose set forth, the combination of an outlet pipe, a hub member encircling the pipe and rotatably supported thereon, a platform carried by the upper end of the hub member, a damper hingedly mounted upon the platform at one side of the outlet pipe, a vane secured to the hub member at the opposite side of the outlet pipe, a stop fiange on the platform in the path of the damper to limit the closing movement of the damper, and means for yieldably holding the damper in open position.

a. in an apparatus for the purpose set forth, the combination of an outletpipe, a hub member rotatably supported on the said pipe, a vane carried by the hub member at one side of the pipe, a platform carried by the upper end of the hub member, a damper pivotally mounted upon the platform at the side of the pipe remote from the vane, an element projecting from the damper beyond the pivot thereof, and a retraetile spring attached to said element and to the hub member whereby to yieldably hold the damper in open position.

5.In an apparatus for the purpose set forth, the combination of an outletpipe, a hub member rotatably supported about the said pipe, a vane carried by the hub member at one side of the pipe, a damper pivotally mounted upon the upper end of the hub member at the opposite side of the pipe, an element projecting from the damper at the rear of the pivot thereof, a spring at-l tached to said element and to the hubmember whereby to yieldably hold the damper in open position, and an arm extending from the damper in angular relation thereto and carrying a vane normally presented to the wind whereby an excessive wind will close the damper.

6. ln an apparatus for the purpose set forth, the combination of a smoke pipe, a plat-form mounted on the upper end of the pipe and rotatable about the same, a damper pivotally mounted on the platform in position to extend over the end of the pipe and close the same, means for yieldably holding the damper raised from the pipe, a bail rising from the platform and extending over the damper to limit the opening movement thereof, and means whereby the damper will be closed in an abnormal wind.V

In testimony whereof I aiiix my signature.

OTTO KELM. IL. el 

